<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>使用 Array.from 方法</title>
</head>
<body>
    <script>
        let arrayLike = {
            '0':'a',
            '1':'b',
            '2':'c',
            length: 3
        };

        // ES5 的写法
        var arr1 = [].slice.call(arrayLike); //['a','b','c']
        console.log(arr1);


        // ES6 的写法
        let arr2 = Array.from(arrayLike); //['a','b','c']
        console.log(arr2);
    </script>
</body>
</html>